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C. OLSON.

SMOKE GONSUMER. f

No. 254,037. Patented Peb.21,18812.

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perform-,eters Patent No. 254,037, dated February ai, ieee'.

Application nieu 'october 2e, resi. (No model.)

To ill whom it may concern A-Be it known that I, CANUTE OLSON, a citizenof the United States, residing atV Chicago, in thccounty of Cook, in theState of Illinois, '5" have invented certain new aind usefulImprovements in Smoke-Consumers, which are fully set forth in thefollowing specication, reference being'had to the accompanying drawings,in whichv Figure 1 is a front elevation of a boiler and furnace providedwith my apparatus. `Figi-2 is a partial section on the line w x inFig.'1,'the structure being broken away back of the iirebox, and theboiler not being in section, but'v r 5V the lower front part of itbeing-entirely broken away. Fig-3 isa section on the lineyy in Fig. 2,only the lower left-hand quarter ofthe structure being included. Fig. 4is a plan section on the"- line e z in Fig. 3. Fig. 5 is a detailed 2o'section on the line c c in Fig. 3, `so as to givel aplan view oftheupper end of the steam-coil. Fig. 6 isV a perspective view of the'shoewhich supports the steam-coil, and of that part offthe grate on whichAit rests.' Fig. 7 'is a front cle- 2 5 vatio'n of the cap or nozzlethrough which the steam is discharged. -V

The same letters denote the same parts in all the figures.

My invention relates to inea-ns foi consum- 3o ing smoke and othercombustible matter which passes off unconsumed from ordinary furnaces 5and itconsists in apparatus of special construction and arrangement foraccomplishing this result by throwing an unbroken horizontal sheet ofsuperheated steam over the ltire just above the coals. The construction,arrangement, and operation of the apparatus employed by me for thispurpose will first be fully described, and the special improvements,which 4o l believe to be new and desire to secure by Letters Patent,will then he pointed out more delinitely in the claims.

In the drawings, A denotes a steam-boiler, and a its steam-dome. Bdenotes the furnace; b, the fire-doors 5 b', the grate-bars, and b2 thebridge. All thesemay be ofordinary construction.

C is a steam-supply pipe passing from the dome down in front of theboiler and into the 5o furnace,preferablyatoneside. The lower horizontalportion, c, which enters the furnace, is

- preferably somewhat larger than the rest. If the u'pperpart be, forexample, three-eighths of an inch in diameter, I nd it advisable tovmake the diameter of ythe part c half an inch. A valve, c', at anyconvenient point in the length of the pipe, regulates the supply ofsteam.v Within the furnace the pipe c is directed to a point over thenearest corner of the grate andl there enters the lower partof asteamcoil, D, which isfsupporte'd on a shoe, D', restingon thegrate-bars at one side of the'grate. The shoe is secured in position bya bolt, cl', anda nntonl the under side of the grate, or by otherconvenientlmeans. The coil is'arranged i on lthe inner; side of thefire-box, directly over the grate, the number of turns being greater orless, according to the degree to which it is i desired to: hea-t thesteam. In the construction shown 'iny the drawings", which I iindsatisfactory inpractice, the'coil passes twice straight upward and oncestraight'downward. At the end ofthe second upward pass the pipe iscarried horizontally across to the boiler, thence straight down ward ashortdistance, and thence horizontally back to the Wall at the ,cornerof the fire-box, and down again to a poi-nt somewhat abovel the coalswhich rest on the grate andv about on a level with the point where thepipe C enters the furnace. Here it turns again into a horizontal anddiagonal direction, and projecting a little beyond the rest of the coilterminates in a dat cap or nozzle, D2, (shown in deta-il in Fig. 7,)having a narrow horizontal slot, d2, extending quite across it andnotching its sides to a slight depth. The object of the upperhorizontalpturn, which has been described, is to brace the coil betweenthe boiler Yand the wall.

The pipe of which thecoil is composed should be somewhat larger thanthat through which the steam enters it, in order to give room for theexpansion of the steam. If the horizontal pipe c is half an inch indiameter, the pipe of the coil may advantageously be three-quarters ofan inch. Common single pipe may be used for the coil; but double pipewill be found preferable. The steam, passing from the dome through thepipe G into the coil within the rebox, ascends and descends through thecoilin the direction shown by the arrows in Fig. 2,

being all the time directly over the fire, and

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in its passage becomes superheated. It then escapes through the slot d2and spreads in a sheet over the whole surface of the burning coals,mingling with the smoke and gases as they rise, and causing a perfectcombustion of them before they can pass over the bridge.

Inasmuch as the discharging-pipe of the coil projects diagonally and buta short distance from the corner of the fire-box, it throws its sheet ofsteam over practically the whole surface of burning coals. Otherarrangements and proportions of this pipe and of the rest of the coilwould give an effect the same in kind but inferior in degree. I haveshown those which I deem best; but it will be understood that I do notlimit myself to them.

Instead of the coil which I have shown, an annular drum might be usedwith similar effect, and other modifications which do not affect theprinciple ofthe invention will readily suggest themselves.

The apparatus which I have described is cxtremely simple and cheap, andI have found on trial that it is perfectly efficacious. For all theintense heat to which it is subjected within the re-box a coil made ofdouble pipe will be found to do satisfactory service; and when one coilis burned out, or nearly so, it can be removed and replaced with verylittle trouble and in averyshort time. The removal is thus easilyaccomplished, for the reason that the coil is not permanently attachedto any portion of the structure, but rests loosely on the shoe D, and isheld in place at its upper end loosely between the boiler and side wallof the furnace. It is simply required, therefore, to disconnect theservice-pipe, when the coil may be lifted from its place and taken outthrough the openings of the furnace.

I am aware that many devices have heretofore been devised for throwingjets of steam into the tire-box and upon the burning fuel; but in allcases, so far as I am aware, the steam has been sprayed in, and, togreater or less extent, directed down upon the fuel. By my apparatus Iavoid the direct impingement of the steam upon the fuel and the simplespraying, by both of which the steam is simply diffused among theproducts of combustion with little or no effect. By means of thehorizontal slotted nozzle I direct an unbroken sheet of steamcontinuously and with force across the rising products of combustion,and thus effectually check them and cause them to be consnmed, and inthis unbroken horizontal sheet, in contradistinction from the old methodof spraying, the main principle of my invention consists.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The steam-heater D, in combination with the shoe D', attached to thegrate-bars of the furnace, and the boiler A, between which and thefurnace-wall the upper end of the heater is held, substantially asdescribed.

2. An apparatus for consuming or preventing smoke, consisting ofa singlesteam holder or receiver, D, arranged within thc furnace and at onecorner of the draft end thereof, and provided with a horizontal fan-jetnozzle, D2, extending diagonally from the receiver and arranged justabove the bed of coals, whereby the steam is snperheated and thendelivered in an unbroken horizontal sheet just over the coal-bed, butnot in contact therewith, substantially as and for the purpose setforth.

3. In combination with the fire-box of la furnace, a superheater,steampipes for supplying said superheater, a discharge-pipe attached tosaid superheater, having a horizontally-slotted nozzle arranged a littleabove the grate, and adapted to discharge an unbroken and a continuoussheet of steam horizontally over practically the whole tire,substantially as described.

CANUTE OLSON.

Witnesses:

THOMAS H. Palisa, W. C. CoRLIEs.

